chore: upgrade @openzeppelin/contracts to 5.4.0 in issuance packages

- Updates issuance package from 5.3.0 to 5.4.0 (latest stable)
- Updates issuance test package from 5.3.0 to 5.4.0
- Maintains compatibility with Solidity 0.8.27
- All tests passing with updated dependencies

Author: RembrandtK

packages/issuance/package.json

@@ -41,8 +41,8 @@
     "@graphprotocol/toolshed": "workspace:^",
     "@nomicfoundation/hardhat-ethers": "catalog:",
     "@nomicfoundation/hardhat-verify": "catalog:",
-    "@openzeppelin/contracts": "^5.3.0",
-    "@openzeppelin/contracts-upgradeable": "^5.3.0",
+    "@openzeppelin/contracts": "^5.4.0",
+    "@openzeppelin/contracts-upgradeable": "^5.4.0",
     "@openzeppelin/hardhat-upgrades": "^3.9.0",
     "@typechain/ethers-v6": "^0.5.0",
     "@typechain/hardhat": "catalog:",

packages/issuance/test/package.json

@@ -22,8 +22,8 @@
     "@nomicfoundation/hardhat-foundry": "^1.1.1",
     "@nomicfoundation/hardhat-network-helpers": "^1.0.0",
     "@nomicfoundation/hardhat-toolbox": "5.0.0",
-    "@openzeppelin/contracts": "^5.3.0",
-    "@openzeppelin/contracts-upgradeable": "^5.3.0",
+    "@openzeppelin/contracts": "^5.4.0",
+    "@openzeppelin/contracts-upgradeable": "^5.4.0",
     "@openzeppelin/foundry-upgrades": "0.4.0",
     "@types/chai": "^4.3.20",
     "@types/mocha": "^10.0.10",